Eeport T7. S. F. C. 1883.— Tanner. Albatross. 



PLATE XLIX. 



Fig. I 



Fig. 2. 



Tig. 3. 



Fig. 4. 



1. Coiiunon dredge. 2. Chester lake-diedge. 3 and 4. liliikc dredge. 



